height=1.75
weight=80.5
bmi =80.5/(1.75 * 1.75)
print('bmi = ',bmi)
if bmi <18.5:
    print('过轻')
elif bmi >=18.5 and bmi <=25:
    print('正常')
elif bmi >=25 and bmi <=28:
    print('过重')
elif bmi >=28 and bmi <=32:
    print('肥胖')
elif bmi>32:
    print('严重肥胖')